# std::indirectly_movable_storable

From cppreference.com
< cpp‎ | iterator

Defined in header `<iterator>` |  |
template< class In, class Out > concept indirectly_movable_storable = std::indirectly_movable<In, Out> && std::indirectly_writable<Out, std::iter_value_t<In>> && std::movable<std::iter_value_t<In>> && std::constructible_from<std::iter_value_t<In>, std::iter_rvalue_reference_t<In>> && std::assignable_from<std::iter_value_t<In>&, std::iter_rvalue_reference_t<In>>; |  | (since C++20)

The `indirectly_movable_storable` concept specifies the relationship between an `indirectly_readable` type and an `indirectly_writable` type. In addition to `indirectly_movable`, this concept specifies that the move from the `indirectly_readable` type can be performed via an intermediate object.

### Semantic requirements

`In` and `Out` model std::indirectly_movable_storable<In, Out> only if given a dereferenceable value `i` of type `In`:

- After the definition std::iter_value_t<In> obj(ranges::iter_move(i));, `obj` is equal to the value previously denoted by *i, and
- if std::iter_rvalue_reference_t<In> is an rvalue reference type, *i is placed in a valid but unspecified state after the initialization of `obj`.

### Equality preservation

Expressions declared in requires expressions of the standard library concepts are required to be equality-preserving (except where stated otherwise).

### See also

indirectly_movable (C++20) | specifies that values may be moved from an `indirectly_readable` type to an `indirectly_writable` type (concept)
indirectly_copyable_storable (C++20) | specifies that values may be copied from an `indirectly_readable` type to an `indirectly_writable` type and that the copy may be performed via an intermediate object (concept)

Retrieved from "https://en.cppreference.com/mwiki/index.php?title=cpp/iterator/indirectly_movable_storable&oldid=159905"